How do I do SELECT * FROM TABLE WHERE KEY IN ({list})?
The title says it all really.
Is there a reasonable performant way to perform the query
SELECT * FROM TABLE WHERE KEY IN ({list})where {list} is String []?
I am currently creating a PreparedStatement with a for loop like this StringBuffer sb = new StringBuffer ("SELECT * FROM TABLE WHERE ID IN (");
for (int ii=0;ii<keys.length;ii++) {
sb.append (keys [ii]);
if (ii != keys.length-1) sb.append (",");
sb.append (")");but this means that the prepared statement is created each time I call my method and so I'm not sure that the optimizer will find it easy to cope with. Is there a construction that I'm missing along the lines of SELECT * FROM TABLE WHERE KEY = ? where I can create the PreparedStatement once and just call setObject or something on it when the values in {list} change?
but this means that the prepared statement is created
each time I call my method and so I'm not sure that
the optimizer will find it easy to cope with.You are right, the optimizer won't find that easy to deal with (presuming that is even relevant for your driver/database.) But most optimizers won't do anything with statements that change and that is what you are doing.
You could create several prepared statements which have a common number of bind variables. For example 10 statements with from 1 to 10 bind values. This will work if most of the queries use those.
Similar Messages
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How to achieve that "SELECT * FROM table WHERE age BETWEEN 18 AND 23 AND n"
How to achieve the SQL like that "SELECT * FROM table WHERE age BETWEEN 18 AND 23 AND name = 'Will' " with BDB C-API
The primary key in the primary database is 'age' ,and the secondary key in the secondary index is 'name' ,in a lot of examples ,there are all simple , but how to do that complex one.thx~but this means that the prepared statement is created
each time I call my method and so I'm not sure that
the optimizer will find it easy to cope with.You are right, the optimizer won't find that easy to deal with (presuming that is even relevant for your driver/database.) But most optimizers won't do anything with statements that change and that is what you are doing.
You could create several prepared statements which have a common number of bind variables. For example 10 statements with from 1 to 10 bind values. This will work if most of the queries use those. -
Can I simulate SELECT * FROM TABLE WHERE ROW IN (1111,2222) using SQLJ
I have a fct like
public void fct(String inStr) {
String str = "SELECT * FROM TABLE WHERE ROW IN" + inStr;
// then I xecute the query using JDBC connection
But I want to do the same thisn using SQLJ like:
public void fct(String inStr) {
#sql [nctx] iter = { SELECT * FROM TABLE WHERE ROW IN :inStr}
When I run the second version and give a parameter like "(1111,2222)" it gives
ORA-01722: invalid number error.
Is there a way to give parameters to in clauses of SQLJ statements.
Thanks in regard.This is a SQLJ FAQ. You can find the FAQ at:
http://technet.oracle.com/tech/java/sqlj_jdbc/htdocs/faq.html
Your question is addressed in the following section:
http://technet.oracle.com/tech/java/sqlj_jdbc/htdocs/faq.html#variablesizevaluelist
Note that that section has a typo. The lines:
? // populate mynumbers
#sql { SELECT * FROM tab WHERE col in (:(a[0]),:(a[1]),?};
should read:
... // populate mynumbers
#sql { SELECT * FROM tab WHERE col in (:(a[0]),:(a[1]),...};
By the way, with the next release SQLJ will support pasting in of dynamic SQL fragments. Then you'll be able to do pretty much what you are trying to accomplish here (albeit with slightly different syntax). Until then you'd have to use the workarounds from the FAQ. -
Reason behind this query ,SELECT * FROM table WHERE 1 0
HEllo,
I would like to know the reason behind using this query ,
SELECT * FROM <table> WHERE 1 < 0
before executing the actual SQL query.
Is there any special reason or the JDBC receiver side is configured like that.
Is there any option to overcome this process like, can we remove this option or stop using this.
Why the JDBC adapter basically sending this query on the DB?
Thanks,
Soorya,Hi,
if you run this query, you wont be able to see any records of the table.
SELECT * FROM <table> WHERE 1 < 0
if you run this query you will see all records
SELECT * FROM <table> WHERE 0 < 1
same with SELECT * FROM <table> WHERE 1=1
So you can check this out that whats happening in your code before executing actual query. just try to co-relate.
regards
Aashish Sinha
PS : reward points if helpful -
Select * from table where rownum 5; no rows returned? why is it so?
select from table where rownum > 5;*
no rows returned. why is it so?
can anyone explain me?Hi,
rownum is pseudo column, and it is based on the sort order.
For ex, if you want to get the first 5 employees who get the least salary, you use,
select ename,sal from
(select ename, sal
from emp
order by sal )
where rownum<=5
ENAME SAL
SMITH 800
ALLEN1 890
JAMES 951
TURNER 998
ADAMS 1100Suppose, if you want to use highest salary, you change the order by and not the rownum. So, it becomes,
select ename,sal from
(select ename, sal
from emp
order by sal desc)
where rownum<=5
ENAME SAL
KING1 5000
FORD 3000
SCOTT 3000
JONES 2975
BLAKE 2850 So, its not the rownum you would want to change, but the order by.
-Arun -
Newbie Select * FROM table where IF Numeric else something else
I have a text on a web page. If one can enter an EMPLOYID ( like 55 ) or
lastname like 'SMITH'.
I tried using INSTR and Substr but no avail.
Select *
from Atable
WHERE
IF SUBSTR(myfield,1,1)="0" OR
IF SUBSTR(myfield,1,1)="1" OR
etc.
EMPID=to_number(myfield)
ELSE
Upper(Lastname) like Upper(myfield)
Suggestions?
TIA
SteveYes myfield could be either "55" OR it could be "SMITH"
Otherwise I would have to have 2 textboxes on the web page.
One for EmployeeID and one for lastname.
Thanks.
Steve -
SELECT * FROM table WHERE id NOT IN? Help with statement.
Hi,
Two tables. Orders (orderID = PK) and Paid Orders (orderID =
FK)
I want to display a recordset of orders from the Orders table
where the
order ID doesn't appear in the Paid Orders table.
I have tried something like this:
SELECT *
FROM dbo.tblOrders
WHERE orderID NOT IN ( SELECT TOP 100 PERCENT
tblPaidOrders.orderID FROM
dbo.tblPaidOrders )
...no joy with that though. Would appreciate some guidance.
Thank you.
Regards
Nath.Hi Nancy,
Before I begin that, can I ask if there is an issue with the
OR?
I need it to be:
(orderID IN (SELECT qryPaidOrders.orderID FROM qryPaidOrders)
ORDER BY
orderdate ASC) AND ((customerid = MMColParam1) OR (vanopID =
MMColParam2))
MMColParam1 is exactly the same as MMColParam but, for some
reason
unbeknowns to me, DW8.0.2 won't allow me to use it twice.
That's neither
here nor there though, as creating a 2nd variable
(MMColParam2) solves that
particular issue.
Do I need additional ( ) anywhere considering it is an OR
though?
Thanks.
nath.
"Nancy *Adobe Community Expert*" <[email protected]>
wrote in message
news:[email protected]...
>I would think so .. now that you have the core statement
working .. try
>adding the other portions. Put the main statement in ( )
and add the
>others. Like this:
>
> SELECT *
> FROM dbo.qryOrders
> WHERE (orderID IN (SELECT qryPaidOrders.orderID FROM
qryPaidOrders)
> ORDER BY orderdate ASC) AND (customerid = MMColParam1)
AND (vanopID =
> MMColParam2)
>
> See what that gives you and fiddle with those till you
get what you want.
>
>
> --
> Nancy Gill
> Adobe Community Expert
> BLOG:
http://www.dmxwishes.com/blog.asp
> Author: Dreamweaver 8 e-book for the DMX Zone
> Co-Author: Dreamweaver MX: Instant Troubleshooter
(August, 2003)
> Technical Editor: DMX 2004: The Complete Reference, DMX
2004: A
> Beginner's
> Guide, Mastering Macromedia Contribute
> Technical Reviewer: Dynamic Dreamweaver MX/DMX: Advanced
PHP Web
> Development
>
>
>
>
> "tradmusic.com" <[email protected]> wrote
in message
> news:[email protected]...
>> Hi,
>>
>> After a bit of twiddling, I changed the statement to
this:
>>
>> SELECT *
>> FROM dbo.qryOrders
>> WHERE orderID IN (SELECT qryPaidOrders.orderID FROM
qryPaidOrders)
>> ORDER BY orderdate ASC
>>
>> ...and it displays only those records who appear in
the Paid Orders
>> table. If I change this to NOT IN, it displays only
the orders in the
>> Orders table.
>>
>> Ideal, but I need to apply the customerID and
vanopID variables....is
>> that possible within this one statement?
>>
>> Really appreciate the help,
>> Regards
>> Nath.
>>
>> "Nancy *Adobe Community Expert*"
<[email protected]> wrote in message
>> news:[email protected]...
>>> You've added to it since the first post. Take
out the customerID and
>>> vanopID parts and try focusing on just the
orderID part. Get that
>>> working first.
>>>
>>> I would try seeing if you can select those
orderID's that are IN the
>>> subquery first .. that would see whether or not
the problem is the NOT
>>> .. which should work .. but let's see first
whether the culprit is the
>>> query structure or not. See if you can select
the orderID's that are in
>>> the paid orders table from the main query.
>>>
>>>
>>> --
>>> Nancy Gill
>>> Adobe Community Expert
>>> BLOG:
http://www.dmxwishes.com/blog.asp
>>> Author: Dreamweaver 8 e-book for the DMX Zone
>>> Co-Author: Dreamweaver MX: Instant
Troubleshooter (August, 2003)
>>> Technical Editor: DMX 2004: The Complete
Reference, DMX 2004: A
>>> Beginner's
>>> Guide, Mastering Macromedia Contribute
>>> Technical Reviewer: Dynamic Dreamweaver MX/DMX:
Advanced PHP Web
>>> Development
>>>
>>>
>>> "tradmusic.com"
<[email protected]> wrote in message
>>> news:[email protected]...
>>>> Hi Nancy,
>>>>
>>>> Have just tried that, but it is still
displaying records whose orderID
>>>> is also in a record in the Paid Orders
table?
>>>>
>>>> I've got:
>>>>
>>>> SELECT *
>>>> FROM dbo.qryOrders
>>>> WHERE customerID = MMColParam OR vanopID =
MMColParam1 AND orderID NOT
>>>> IN (SELECT qryPaidOrders.orderID FROM
qryPaidOrders)
>>>> ORDER BY orderdate ASC
>>>>
>>>> Hope you can help.
>>>> Thanks. :o)
>>>> Nath.
>>>>
>>>>
>>>> "Nancy *Adobe Community Expert*"
<[email protected]> wrote in message
>>>> news:[email protected]...
>>>>> Why couldn't your inner query just be
SELECT orderID from
>>>>> dbo.tblPaidOrders? Wouldn't the top 100%
be all of them?
>>>>>
>>>>>
>>>>> --
>>>>> Nancy Gill
>>>>> Adobe Community Expert
>>>>> BLOG:
http://www.dmxwishes.com/blog.asp
>>>>> Author: Dreamweaver 8 e-book for the DMX
Zone
>>>>> Co-Author: Dreamweaver MX: Instant
Troubleshooter (August, 2003)
>>>>> Technical Editor: DMX 2004: The Complete
Reference, DMX 2004: A
>>>>> Beginner's
>>>>> Guide, Mastering Macromedia Contribute
>>>>> Technical Reviewer: Dynamic Dreamweaver
MX/DMX: Advanced PHP Web
>>>>> Development
>>>>>
>>>>>
>>>>> "tradmusic.com"
<[email protected]> wrote in message
>>>>>
news:[email protected]...
>>>>>> Hi,
>>>>>>
>>>>>> Two tables. Orders (orderID = PK)
and Paid Orders (orderID = FK)
>>>>>> I want to display a recordset of
orders from the Orders table where
>>>>>> the order ID doesn't appear in the
Paid Orders table.
>>>>>>
>>>>>> I have tried something like this:
>>>>>>
>>>>>> SELECT *
>>>>>> FROM dbo.tblOrders
>>>>>> WHERE orderID NOT IN ( SELECT TOP
100 PERCENT tblPaidOrders.orderID
>>>>>> FROM dbo.tblPaidOrders )
>>>>>>
>>>>>> ...no joy with that though. Would
appreciate some guidance. Thank
>>>>>> you.
>>>>>>
>>>>>> Regards
>>>>>> Nath.
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
> -
Select from table where last character in string is numeric
Hello,
I have a table STREETS with a field called ADDRESS. I would like to select all records from streets where the last character in Address is a number.
Select ADDRESS from STREETS where regexp_like(substr(address, ?,?,), '[0-9]');
--? means that I don't know what to put in here!
I'm not sure if substr is the best approach for this, since i only want the last character and the records are of varying lengths.
Thanks!Hi,
If you want to use regular expressions:
WHERE REGEXP_LIKE ( address
, '[0-9]$'
)You can get the same results, probably more efficiently, without regular expressions:
WHERE INSTR ( '0123456789'
, SUBSTR (address, -1)
) > 0 -
Select * from TABLE where Filed like pa_input.
Hello,
the following works fine
select * from ZTABLE INTO wa_myarea WHERE myfield LIKE 'a%'.
Now I don't want to hard code the selection criteria for myfield, but let the user select one, so I did:
parameters pa_input type mytype.
select * from ZTABLE INTO wa_myarea WHERE myfield LIKE pa_input.
If the user enters now for example a% everything works again fine. But I assume that a user rather would enter a* for a wild card search and that doesn't work. Do I have to manually replace all * in my variable with % before I run the select statement? I hope not... What would be the best way?
Thanks.Moderator message - Please do not ask basic questions - thread locked
Rob -
Select from table where field contains the first 3 character
The value of the field contains leading zeros like 0000000123, 0000001123, 0000011123.
Now we need to check the table for entries that contains the first three characters excluding the zeros.
If we are looking for '123' then we should be retrieving 0000000123 and not 0000001123 or 0000011123.
Is there a way to get that value in SQL statement with only the exact result?
Thanks.P156550 wrote:>
> We've tried to use LIKE in our SQL statements and filtered it but there are a bunch of data and we want to get the exact row to improve the performance.
Hello Adjhan,
Yes, you need not use LIKE.
You can use CONVERSION EXIT. I see that the length of your data is CHAR10.
So try to use the code i have suggested & revert back if any doubts.
@Soumyaprakash:
If read the original post carefully, the OP has said:
If we are looking for '123' then we should be retrieving 0000000123 and not 0000001123 or 0000011123.
So LIKE does not come into the picture.
Good Luck,
Suhas -
Post Author: JuneCruz
CA Forum: Data Connectivity and SQL
These is my table with 3 fields NFstCol, NsndCol, and NtrdCol
NFstCol NSndCol NTrdCol -
1 One 12 One 13 One 14 Two 15 Two 16 Two 17 One 28 One 29 One 210 One 311 One 312 One 316 Two 217 Two 218 Two 219 Four NULL20 Four NULL21 Four NULL
Now I want to display the records all records that have the maximum ntrdcol group by nsndcolso the output should be. NfstCol NtrdColOne 10 3 11 3 12 3
Two 16 2 17 2 18 2
Four 19 null 20 null 21 null
Can this be done without using view and command as source for the database.thanks.Post Author: JuneCruz
CA Forum: Data Connectivity and SQL
Hi Jagan, all;
Thanks for the reply. It works. Now Im grouping again my reports based on status.
my records would be.
FstCol NsndCol Status
1 One Inactive 2 One Active 3 One Active
My first group would be Status , then by NsndCol
However my report shows Active FstCol NsndCol 3 One Inactive 1 One
but I want only record number 3 having 3 as the max id for One, I just want to ignore about the Status but I need to group my records based on status also
FstCol NsndCol 3 One
Thanks, -
How to do a SELECT from different tables into an internal table?
How to do a SELECT from different tables into an internal table?
I want to select data from MARA, MARC and ZPERSON and populate my ITAB_FINAL
REPORT zinternal_table.
TABLES:
mara,
marc,
zperson.
TYPES:
BEGIN OF str_table1,
v_name LIKE zperson-zname,
v_matnr LIKE marc-matnr,
v_emarc LIKE marc-emarc,
v_werks_d LIKE marc-werks_d,
v_dstat LIKE marc-dstat,
END OF str_table,
i_table1 TYPE STANDARD TABLE OF str_table1.
DATA:
BEGIN OF str_table2,
v_mandt LIKE mara-mandt,
v_ernam LIKE mara-ernam,
v_laeda LIKE mara-laeda,
END OF str_table2,
itab_final LIKE STANDARD TABLE OF str_table2.first find the link between mara , marc and zperson , if u have link to 3 tables then u can jus write a join and populate the table u want ( thats final table with all the fields).
u defenitely have alink between mara and marc so join them and retrieve all data into one internal table.
then for all the entries in that internal table retrieve data from zperson into another internal table.
then loop at one internal table
read another internal table where key equals in both the tables.
finally assign fileds if sy-subrc = 0.
gs_finaltable-matnr = gs_table-matnr
etc...
and finally append gs_finaltable to gt_finaltable.
there u go ur final table has all the data u want.
regards
Edited by: BrightSide on Apr 2, 2009 3:49 PM -
Select data from table where field is initial
I have table that has 10 million records.
I want to select data from this table where certain date field is blank.
*SELECT * FROM table*
INTO TABLE internal table
WHERE PSTNG_DATE = BLANK.
Does anybody know how to select data from data base table when certain field is blank.
I cont select all data once and delete which i dont want, the table is big, it will blow up app server.
thanks in advance,
Sachin
Moderator: Pls do not lock the posting instead provide me the link, its disrespecting.Respect the forum rules and common sense, and you will be respected.
"how to select data from a database table when the field is blank" is very basic, and basic questions will be locked, because they have been asked many times and you can find the answer yourself with a little effort. There is nothing disrespectful about it.
Thread locked.
Thomas -
How do you delete records from table with data in a select option
how do you delete records from table with relevant to data in a select option..how to write coding
Hi,
Try
if not s_select_option [ ] is initial.
delete * from table
where field in s_select_option.
endif.
commit work.
Be careful though. If select option is emty, you will delete the entire table.
Regards,
Arek -
How insert into table select from table works in jdbc driver?
Hi, Supposing one table has two LOB fields, one LOB field is BLOB type while the other is CLOB type, I use the following sql statement to copy a row into a new row:
insert into table (id, file_body, file_content) select new_id, file_body, file_content from table where id = '111';
After commit on the connection, I can see the copied record in the table and both LOB fields are not null and this's the expected behavior.
However after some days later, the copy function becomes to be a problem, the BLOB field named file_body can be null when the copy job is done, while other fields copy successfully.
The issue can not be reproduced every time.
I suppose the jdbc driver may try to allocate byte buffer in the heap to perform copy operation for BLOB fields,if there is no enough memory available in the heap the copy operation may fail but the commit on the connection can be successful.b/c I can see a lot of OOM errors in the log files and I believe this can contribute to the issue.
Hope someone can give me a hint or comments.
Thanks,
SuoNayiI want to figure out what's memory leak point and I have tried the following solutions but none worked:
1.I have tried to dump the memory of the JVM but failed,I can see the following errors :
[root@localhost xxx]# jmap -heap:format=b 3027
Attaching to process ID 3027, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.5.0_16-b02
Unknown oop at 0x00002b21a24cd550
Oop's klass is null
Finding object size using Printezis bits and skipping over...
Unknown oop at 0x00002b21a3634380
Oop's klass is null
Finding object size using Printezis bits and skipping over...
2.and the thread stack can not be dumped successfully as well:
Thread 3046: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be imprecise)
Error occurred during stack walking:
the version of java is:
java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b02)
Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_16-b02, mixed mode)
I have to added dump thread stack option in JVM arguments, -XX:+HeapDumpOnOutOfMemoryError.
If there are other solutions please let me know, thanks.
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